CN101931207A - Restorable overcurrent protector and electronic product - Google Patents
Restorable overcurrent protector and electronic product Download PDFInfo
- Publication number
- CN101931207A CN101931207A CN2010102731164A CN201010273116A CN101931207A CN 101931207 A CN101931207 A CN 101931207A CN 2010102731164 A CN2010102731164 A CN 2010102731164A CN 201010273116 A CN201010273116 A CN 201010273116A CN 101931207 A CN101931207 A CN 101931207A
- Authority
- CN
- China
- Prior art keywords
- pptc
- metal substrate
- bimetal leaf
- electrode
- overcurrent protector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
The invention discloses a restorable overcurrent protector and an electronic product. The electronic product comprises the overcurrent protector connected in the circuit in series. The overcurrent protector comprises a metal substrate, a bimetallic strip and a PPTC, wherein the metal substrate is provided with a first electrode; the bimetallic strip is provided with a second electrode; the metal substrate and the bimetallic strip are in elastic contact via the first electrode and the second electrode and realize series connection; a series circuit formed by the metal substrate and the bimetallic strip is connected with PPTC in parallel; and PPTC is in thermal contact with the bimetallic strip. In case of short circuit or overload of the circuit, the bimetallic strip of the overcurrent protector is deformed to disconnect the first electrode and the second electrode, the current passes through PPTC and generates heat, PPTC transfers the heat to the bimetallic strip to maintain the temperature of the bimetallic strip all the time, so that the bimetallic strip can not be cooled and can not lead to that the first electrode and the second electrode restore contact to conduct the whole circuit, thus avoiding circuit burnout and safety accidents.
Description
Technical field
The present invention relates to a kind of overcurrent protector, relate in particular to a kind of restorable overcurrent protector and electronic product.
Background technology
PPTC is a kind of over-current protection device that adopts high molecular polymerization to form; generally be connected between power supply and the circuit; when circuit is short-circuited or transships; PPTC is phase step type and transits to high-impedance state; fault current in the loop is blocked rapidly, thereby circuit is limited fast and accurately and protects, after the fault of circuit is got rid of; PPTC can automatically restore to normal condition, need not manually change.Yet when PPTC used in high voltage environment, electric current can not be too big, so PPTC can not use in high voltage and the big simultaneous environment of electric current.
In addition, for another kind of over-current protection device, promptly existing bimetallic overcurrent protector, when circuit was short-circuited or transships, the heat that electric current produces when flowing through bimetal leaf made bimetal leaf generation deformation, thereby disconnected entire circuit fully.The bimetallic overcurrent protector is applicable to high voltage (more than or equal to 220V) and the big simultaneous environment of electric current.Yet when the fault of circuit does not also have the time of eliminating, because circuit has disconnected the no current process, the temperature meeting natural cooling of bimetal leaf makes circuit reappear conducting, occurs a series of unsafe hidden danger such as circuit burnout easily.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of restorable overcurrent protector and electronic product, and described restorable overcurrent protector can be used for high voltage and the big simultaneous circuit environment of electric current, and can eliminate safe hidden trouble.
For solving the problems of the technologies described above; the technical scheme that the present invention adopts is: a kind of restorable overcurrent protector is provided; comprise a metal substrate; one bimetal leaf and a high molecular positive temp thermistor PPTC; described metal substrate has one first electrode; described bimetal leaf has second electrode; realize being connected in series between metal substrate and the described bimetal leaf by described first electrode and the described second electrode Elastic Contact between described metal substrate and the described bimetal leaf; series circuit that described metal substrate and bimetal leaf are formed and described PPTC are connected in parallel, described PPTC and described bimetal leaf thermo-contact.
Wherein, described PPTC is rectangular structure, and described metal substrate and bimetal leaf are close to the two sides of the length direction of PPTC respectively.
Wherein, described metal substrate and bimetal leaf are close to the ipsilateral of PPTC respectively.
Wherein, described metal substrate is a bimetal leaf.
Wherein, an end of described metal substrate is to close described PPTC one lateral bending song.
For solving the problems of the technologies described above; the technical scheme that the present invention adopts is: a kind of electronic product is provided; comprise the overcurrent protector that is connected in the circuit; described overcurrent protector comprises a metal substrate; one bimetal leaf and a PPTC; described metal substrate has one first electrode; described bimetal leaf has second electrode; described metal substrate and described bimetal leaf are realized being connected in series between metal substrate and the described bimetal leaf by described first electrode and the described second electrode Elastic Contact; series circuit that described metal substrate and bimetal leaf are formed and described PPTC are connected in parallel, described PPTC and described bimetal leaf thermo-contact.
Wherein, described PPTC is rectangular structure, and described metal substrate and bimetal leaf are close to the side of two length directions of PPTC respectively.
Wherein, described metal substrate and bimetal leaf are close to the ipsilateral of PPTC respectively.
Wherein, described metal substrate is a bimetal leaf.
Wherein, an end of described metal substrate is to a lateral bending song.
The invention has the beneficial effects as follows: the overcurrent protector that is different from prior art uses the situation that has potential safety hazard under high voltage and big electric current environment; the present invention combines PPTC and bimetal leaf; can use in the circuit of big electric current and high voltage; even and when short circuit or overload occurring; bimetal leaf generation deformation makes win electrode and the disconnection of second electrode; this moment, electric current made the PPTC heating through PPTC; because the electric current of keeping of PPTC makes PPTC be in the state of heating always; PPTC makes the temperature of bimetal leaf be maintained by PPTC the heat transferred bimetal leaf always; thereby in whole overload; in overcurrent or the overvoltage process; bimetal leaf can not cool off and can not cause first electrode and second electrode to resume contacts and make the entire circuit conducting, thereby avoids circuit to burn out and the situation of a series of security incidents occurs.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of restorable overcurrent protector of the present invention;
Fig. 2 is the structural representation of another embodiment of restorable overcurrent protector of the present invention.
Embodiment
By describing technology contents of the present invention, structural feature in detail, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
See also Fig. 1; restorable overcurrent protector of the present invention; comprise a metal substrate 10, a bimetal leaf 11 and a PPTC 20 (high molecular positive temp thermistor); have one first electrode 21 and one second electrode 22 on described metal substrate 10 and the described bimetal leaf 11 respectively; described metal substrate 10 and described bimetal leaf 11 are connected in series by described first electrode 21 and described second electrode, 22 Elastic Contact respectively, and series circuit and described PPTC 20 that described metal substrate 10 and bimetal leaf 11 are formed are connected in parallel.Described bimetal leaf 11 is that two kinds of bigger different metal or alloy of the cold and hot coefficient of expansion mix formation.The other end of described metal substrate 10 other ends and described bimetal leaf 11 has first pin 12, second pin 23 respectively, described first pin 12, second pin 23 connect external circuit respectively, realize being connected in parallel with the series circuit that described metal substrate and bimetal leaf are formed thereby the two sides of described PPTC 20 contact electrical connection respectively with described first pin 12, second pin 23.One end of described metal substrate 10 is to close described PPTC one lateral bending song, and described metal substrate 10 also can be bimetal leaf.
Described PPTC 20 and described bimetal leaf 11 thermo-contacts.In the present embodiment, described PPTC is rectangular structure, described metal substrate and bimetal leaf are close to the two sides of the length direction of PPTC respectively, thereby PPTC 20 heating is close to the bimetal leaf 11 of one side by thermo-contact with heat transferred, makes bimetal leaf 11 be in deformation state always.
In one embodiment, described metal substrate 10 and bimetal leaf 11 are close to the same side of PPTC 20 respectively, and PPTC 20 generates heat by thermo-contact heat transferred bimetal leaf 11.
See also Fig. 2; it is for another embodiment of restorable overcurrent protector of the present invention; metal substrate 30 and bimetal leaf 40 that protection is arranged in parallel; one end of described metal substrate 30 extends one first pin 32; one end of described bimetal leaf 11 extends second pin 42, and described first pin 32 and described second pin 42 connect external circuit respectively.Be provided with a PPTC 20 between described metal substrate 30 and the described bimetal leaf 40, described metal substrate 30 and described bimetal leaf 40 are close to the two sides of PPTC 20 respectively.Be connected with one first electrode 31 and second electrode 41 on described metal substrate 30 and the described bimetal leaf 40 respectively, described metal substrate 30 and described bimetal leaf 40 respectively by described first electrode 31 and described second electrode 41 mutually Elastic Contact be connected in series, series circuit and described PPTC 20 that described metal substrate 10 and bimetal leaf 11 are formed are connected in parallel, described PPTC 20 and described bimetal leaf 11 thermo-contacts.In the present embodiment, fixing between an end of described second electrode 41 and the bimetal leaf 40 by a snap close 50.Described first electrode 31 and second electrode 41 have an oval contact jaw 311,411 respectively, and described contact jaw 311 and contact jaw 411 be Elastic Contact mutually.
Restorable overcurrent protector of the present invention uses in the circuit environment of the electronic product of high voltage and big electric current; when circuit is short-circuited or transship; the heat that electric current produces when flowing through bimetal leaf makes bimetal leaf generation deformation; cause second electrode of bimetal leaf and first electrode of metal substrate to disconnect; at this moment; electric current is flowed through and is connected in parallel on the PPTC at bimetal leaf two ends; because PPTC has the electric current of keeping; make PPTC be in the state of heating always; PPTC will be maintained the temperature of heat transferred bimetal leaf and bimetal leaf by PPTC always; bimetal leaf keeps deformation, gets rid of up to the fault of circuit.Have only after entire circuit is cut off, PPTC loses and keeps electric current, and the temperature of PPTC could slowly be cooled off, and bimetal leaf cools down gradually, and deformation returns to original form, and second electrode resumes contacts with first electrode again, returns to initial contact condition.
The overcurrent protector that is different from prior art can't use in the circuit of big electric current and high voltage and have the situation of potential safety hazard; the present invention is with the use that combines of PPTC and bimetal leaf; and bring into play its advantage separately; can use in the circuit of big electric current and high voltage; even when short circuit or overload occurring; bimetal leaf generation deformation makes win electrode and the disconnection of second electrode; but because PPTC in parallel still has the electric current process; make the PPTC heating; this part keeps electric current makes PPTC be in the state of heating always; the temperature of bimetal leaf is maintained by PPTC always; thereby in whole overload; in overcurrent or the overvoltage process; bimetal leaf can not make the entire circuit conducting because of cooling causes first electrode and second electrode to resume contacts, thereby avoids circuit to burn out and the situation of a series of security incidents occurs.
In sum, restorable overcurrent protector of the present invention can be used in the electron product circuit of high voltage and big electric current, and protection degree of safety height can avoid circuit the situation of a series of potential safety hazards to occur burning and existing.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. restorable overcurrent protector; it is characterized in that: comprise a metal substrate, a bimetal leaf and a high molecular positive temp thermistor PPTC; described metal substrate has one first electrode; described bimetal leaf has second electrode; realize being connected in series between metal substrate and the described bimetal leaf by described first electrode and the described second electrode Elastic Contact between described metal substrate and the described bimetal leaf; series circuit that described metal substrate and bimetal leaf are formed and described PPTC are connected in parallel, described PPTC and described bimetal leaf thermo-contact.
2. restorable overcurrent protector according to claim 1 is characterized in that: described PPTC is rectangular structure, and described metal substrate and bimetal leaf are close to the two sides of the length direction of PPTC respectively.
3. restorable overcurrent protector according to claim 1 is characterized in that: described metal substrate and bimetal leaf are close to the ipsilateral of PPTC respectively.
4. according to claim 2 or 3 described restorable overcurrent protectors, it is characterized in that: described metal substrate is a bimetal leaf.
5. restorable overcurrent protector according to claim 4 is characterized in that: an end of described metal substrate is to close described PPTC one lateral bending song.
6. electronic product; it is characterized in that: comprise the overcurrent protector that is connected in the circuit; described overcurrent protector comprises a metal substrate; one bimetal leaf and a PPTC; described metal substrate has one first electrode; described bimetal leaf has second electrode; described metal substrate and described bimetal leaf are realized being connected in series between metal substrate and the described bimetal leaf by described first electrode and the described second electrode Elastic Contact; series circuit that described metal substrate and bimetal leaf are formed and described PPTC are connected in parallel, described PPTC and described bimetal leaf thermo-contact.
7. electronic product according to claim 6 is characterized in that: described PPTC is rectangular structure, and described metal substrate and bimetal leaf are close to the side of two length directions of PPTC respectively.
8. electronic product according to claim 6 is characterized in that: described metal substrate and bimetal leaf are close to the side of PPTC respectively.
9. according to claim 7 or 8 described electronic products, it is characterized in that: described metal substrate is a bimetal leaf.
10. electronic product according to claim 9 is characterized in that: an end of described metal substrate is to a lateral bending song.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102731164A CN101931207A (en) | 2010-09-06 | 2010-09-06 | Restorable overcurrent protector and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102731164A CN101931207A (en) | 2010-09-06 | 2010-09-06 | Restorable overcurrent protector and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101931207A true CN101931207A (en) | 2010-12-29 |
Family
ID=43370223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102731164A Pending CN101931207A (en) | 2010-09-06 | 2010-09-06 | Restorable overcurrent protector and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101931207A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109429419A (en) * | 2017-08-19 | 2019-03-05 | 周奇琪 | A kind of novel medium barrier plasma generating device |
| CN109961990A (en) * | 2017-12-22 | 2019-07-02 | 南京萨特科技发展有限公司 | A kind of protection element and protective module |
| CN110086144A (en) * | 2011-12-27 | 2019-08-02 | 力特电子(日本)有限责任公司 | Protective device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604259A (en) * | 2003-09-30 | 2005-04-06 | 阿尔卑斯电气株式会社 | Thermal response switch |
| CN201805208U (en) * | 2010-09-06 | 2011-04-20 | 深圳市万瑞和电子有限公司 | Restorable overcurrent protector and electronic product |
-
2010
- 2010-09-06 CN CN2010102731164A patent/CN101931207A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604259A (en) * | 2003-09-30 | 2005-04-06 | 阿尔卑斯电气株式会社 | Thermal response switch |
| CN201805208U (en) * | 2010-09-06 | 2011-04-20 | 深圳市万瑞和电子有限公司 | Restorable overcurrent protector and electronic product |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086144A (en) * | 2011-12-27 | 2019-08-02 | 力特电子(日本)有限责任公司 | Protective device |
| CN110086144B (en) * | 2011-12-27 | 2021-05-18 | 力特电子(日本)有限责任公司 | Protective device |
| CN109429419A (en) * | 2017-08-19 | 2019-03-05 | 周奇琪 | A kind of novel medium barrier plasma generating device |
| CN109961990A (en) * | 2017-12-22 | 2019-07-02 | 南京萨特科技发展有限公司 | A kind of protection element and protective module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203839326U (en) | High-voltage direct-current temperature fuse | |
| CN103457251A (en) | Protective circuit based on PTC thermistor | |
| CN205376400U (en) | Temperature fuse device | |
| CN201733089U (en) | Surge protector | |
| CN203300549U (en) | Temperature fuse protector with dual-protection function | |
| CN101931207A (en) | Restorable overcurrent protector and electronic product | |
| CN103346533A (en) | Circuit structure with protection function | |
| CN203026939U (en) | Novel surge protector | |
| CN201163690Y (en) | Plug | |
| CN201805208U (en) | Restorable overcurrent protector and electronic product | |
| CN204834226U (en) | Novel piezo -resistor | |
| CN204834219U (en) | Thermistor with fuse | |
| CN203950625U (en) | Novel heat protection piezo-resistance and Surge Protector | |
| CN204271013U (en) | A kind of thermomagnetic circuit breaker with small amount overload-alarm wholesale overlond trip function | |
| CN102646547B (en) | Protector for lithium ion battery | |
| CN203039363U (en) | Three-phase surge protector | |
| CN103384419A (en) | Self-fusing protecting electric heating device and protecting method thereof | |
| CN101887790B (en) | Piezoresistor for lightning protection | |
| CN210245194U (en) | Piezoresistor with protection component | |
| CN202549721U (en) | Lithium ion battery protector | |
| CN105336907A (en) | Electric contact structure between battery boxes or battery modules in electric automobile battery pack | |
| CN205248189U (en) | Temperature controller with temperature and electric current protect function | |
| CN219918413U (en) | Self-adjusting fuse and surge protector | |
| CN205141059U (en) | Electric joint design between batteries of electric vehicle inter block battery box or battery module | |
| CN203553897U (en) | Direct-current protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101229 |